6425664554455 has 32 divisors (see below), whose sum is σ = 7772297670144. Its totient is φ = 5099730763776.

The previous prime is 6425664554429. The next prime is 6425664554471. The reversal of 6425664554455 is 5544554665246.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6425664554455 - 2¹⁵ = 6425664521687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6425664554393 and 6425664554402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 386916762 + ... + 386933368.

It is an arithmetic number, because the mean of its divisors is an integer number (242884302192).

Almost surely, 2^{6425664554455} is an apocalyptic number.

6425664554455 is a deficient number, since it is larger than the sum of its proper divisors (1346633115689).

6425664554455 is a wasteful number, since it uses less digits than its factorization.

6425664554455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18075.

The product of its digits is 345600000, while the sum is 61.

The spelling of 6425664554455 in words is "six trillion, four hundred twenty-five billion, six hundred sixty-four million, five hundred fifty-four thousand, four hundred fifty-five".